QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

37 km N of San Juan, Puerto Rico

· 15 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cataño Municipio 41 kmToa Baja Municipio 41 kmLoíza Municipio 41 kmSan Juan Municipio 42 kmDorado Municipio 42 kmCarolina Municipio 46 kmVega Alta Municipio 50 kmGuaynabo Municipio 51 kmBayamón Municipio 52 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.9 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Cataño Municipio, 41 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2642 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 420,000× the energy of this one
  3. Around the size people start to feel M 3.0 38× the energy of this one
  4. This earthquake M 1.9 about 25 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 18.8020, -66.0550. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cataño Municipio, PR 41 km (25 mi) NNE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 41 km (26 mi) NNE of here earthquakes near Toa Baja Municipio
Loíza Municipio, PR 41 km (26 mi) NNW of here earthquakes near Loíza Municipio
San Juan Municipio, PR 42 km (26 mi) N of here earthquakes near San Juan Municipio
Dorado Municipio, PR 42 km (26 mi) NNE of here earthquakes near Dorado Municipio
Carolina Municipio, PR 46 km (29 mi) NNW of here earthquakes near Carolina Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

43 earthquakes have been recorded within 50 km since this one.

  1. 2.6 59 km N of Suárez, Puerto Rico
  2. 2.2 43 km N of Suárez, Puerto Rico
  3. 2.0 4 km NNE of Levittown, Puerto Rico
  4. 1.8 25 km NNE of Luquillo, Puerto Rico
  5. 1.9 51 km NNE of Vieques, Puerto Rico
  6. 2.8 Puerto Rico region
  7. 2.0 61 km N of Loíza, Puerto Rico
  8. 2.6 2 km ESE of Mucarabones, Puerto Rico
  9. 2.4 51 km N of Brenas, Puerto Rico
  10. 2.7 66 km N of San Juan, Puerto Rico
  11. 2.4 50 km NNE of Vieques, Puerto Rico
  12. 2.5 28 km NNE of San Juan, Puerto Rico
  13. 2.7 0 km S of Cataño, Puerto Rico
  14. 2.4 71 km N of Suárez, Puerto Rico
  15. 2.0 55 km N of Suárez, Puerto Rico

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.8 on 2017-08-18 — it released about 19,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.